Contracting apparatus



Nov. 30,1926. 1,608,715

v J. M. BARR CONTRCTING ARPARATUS Filed Nov. 18, 1922 2 Shets-Sheet 1 25l MI I i Patented Nov. 30, 1926.v

UNITED `siA'ri-ts PATENT OFFICE.

JOHN M. ]BARR, OF MILWAUKEE, WISCONSIN, ASS-IGNOR TO 'EI-ILE LOUIS ALLISCOE? PANY, OF MILWAUKEE, WISCONSIN, A CORPORATION 0F WISCONSIN.

CONTRACTING APPARATUS.

Application led November 18. 1922.

This invention relates to contracting apparatus.

The contracting apparatus is particularly adapted to perimetricallycontract the end rings of a rotor winding, although it may be used forvarious other purposes.

An object of the invention is to provide a contracting apparatus forsimultaneously contracting` the perimeter of both end rings of a rotorwinding.

Another object is to provide acontracting apparatus wherein the carrierand the con tracting jaws are integrally formed.

Another object is to provide a contracting apparatus wherein thecontracting` jaws are yieldingly connected with the carrier ment: ber.

Another object is to provide a contracting apparatus wherein thecontracting' jaws and the carrier member are formed from a single tube.

Another object is to produce an etlicient, strong and 'durablecontracting apparatus which may be economically constructed andoperated. i l

Other objects and advantages will hereinafter appear. i

The views of the drawings are:

Fig. 1 is an elevation partly in section ot the contracting apparatuswith a rotor and its winding therein. Y

Fig. 2 is a plan on line 2-2 of Figujl showing the end ring and thecontracting jaws before contraction.

Fig. 3 is a similar view showing the end ring and contracting jaws aftercontraction.

As illustrated in Fig. 1 there are two sets of contracting apparatus onefor each end ring of the rotor winding'. j

Each set of contracting apparatus, in general, comprises a plurality ofcircularly disposed jaws l, an annular carrier 2 there-for, and anannular actuator 3 to surroundthe jaws and move the same radially`toward the center.

As the two sets of contracting apparatus are exactly alike,` the upperset only will `be described and the lower set will be indij members 4land integral yielding` arms 7 Serial No. 601.861.

cated in the drawings by the .saine reference numerals with the additionof primes.

The jaws 1 are 'formed on the inner face oi' contracting members il, theouter faces et which are inclined to cti-operate with an inclined track6 'formed en the inner face ot the annular actuator 3.

rlhe contractingl members 4f are integrally and yieldingly connected tothe carrier 2 by yielding arms 7.

As illustrated. the carrier 2. contracting are formed from a singlemetal tube.

'After the metal tube hasbeen turned to malte ito't the proper shape andthiczncss, then a series of holes 8 are provided inside the carrier 2and the tube is slit-ted from each hole 8 to the upper end oil the tubethus forming the contracting members l and connecting arms 7.

The winding may be applied to the rotor core 9 by inserting theconductors 10 thereof intothe rotor slots and joining the ends of therings 11.

The conductors may be inserted int-o the rotor .slots in the mannershown in my copending applications, Serial Nos. 537,654, tiled February18, 1922, and 605,228, filed December 6, 1922. or in any other desirablemanner.

The apparatus described herein is particularly adapted top-erimetrically bend or impress thev end rings 11 of the winding1 to`hold the conductors 10 thereof within the .slots of the rotor.

The rotor with the winding applied thereto is arranged inside thecarriers 2 and 2 with a spacing ring 12 therebetween, and the actuators3 and 3 are placed in position around the contracting members l and d.

Spacing rings of different lengths may be used to adapt the apparatusfor windings of dilierent lengths.

Plugs or mandrels 13 and 1a are provided to limit the extent to whichthe end rings ot the windings are perimetrically contracted.

til)

The plug 13 has an annular shoulder 15 to abut an end of the rotor andspace the plug therefrom.

The plug 14 has a similar shoulder 16 to serve the same purpose. Y

The Vplug 14 also has a flange 17 on which rests the contracting member4.

The lower actuator 3 rests upon a plate 18, and a plate 19 is placed ontop of the upper actuator 3.

A centering rod Y20 is surrounded by a helical spring 21 which supportsthe plug 14 and resilicntly holds the same in place.

The contracting apparatus with the rotor therein is placed upon the bedplate 22 of a power press and the plunger 23 thereof lowered intocontact with the upper plate 19.

Pressure upon the upper plate 19 Vby means of the plunger 23 causes theactuator and carrier of each set of the contracting apparatus to moveaxially one toward the other' thereby causing the jaws to move inwardlyand contract the perimeter of the end rings of the rotor winding. y

Before contraction the end rings are of the diameter and occupy theposition illustrated in Fig. 2, while after contraction the end ringsare of the diameter and occupy the f position illustrated in Figure 3. A

The helical spring 21 supports the lower plug 14 and allows the plug tomove downwardly toward the plate 18 during the contracting operation.

lVhen pressure upon' the contracting apparatus is released the stored upenergy in the helical spring 21 forces the plug 14 and all partssupported thereby upwardly so thatkthe same may be disassembled morereadily.

The invention Vset forth herein is, of course, susceptible of variousmodifications and adaptations. Y

YAThe invention claimed is Y Y A1. Contracting apparatus having incombination an annular' carrier. a plurality of circularlyk disposedcontracting members, yielding' members integrally connecting thecontracting members to the carrier, each n contracting member having` ajaw on its inner face and having its outer face inclined, and an annularactuator to surround theV contracting members and having an .inclinedtrac-l: t-o co-operate with. the inclined `faces so as to move the jawsinwardly when the carrier and actuator are moved relatively one towardthe other.

3. A machine for contracting the end rings of a rotor winding,comprising a pair of carriers, jaws mounted on said carriers to engagethe end rings, and a pair of actuators adapted to actuate said jaws.

4. A machine as defined in claim 3, in which the actuators are invertical alincment with each other.

Amachine as defined in claim 3, in which the actuators arerelatively-movable toward each other.

6. A machine as defined in claim 3, in which the actuators are invertical alinement with each other, said actuators being relativelymovable toward each other.

7. A machine for contracting ,the end rings for a rotor winding,comprising a pair of carriers, jaws mounted thereon, the jaws on onecarrier extending in an opposite-direction to the jaws on the othercarrier, and actuators adapted to actuate said jaws.

8. A machine Vas defined in claim 7, in which the jaws have outerinclined faces adapted to be engaged by inclined surfaces on theactuators.

9. A machine as defined in claim 7, in which the jawsiare arrangedannularly. Y

10. A machine as defined in claim 7, in which the carriers are mountedon a common support. Y j

11. A machine as defined in claim 7 in which the jaws are arrangedannularly and in vertical alinement with the actuators.

, .12. A machine for contracting the end ringsof a rotor winding,comprising an actuator, a tube having longitudinal slitsextending fromthe'top of thetube to a Apoint near the bottom, the parts of the tubebetween the slits serving as .contractingV members, said contractingmembers having jaws on their inner faces, their outer faces beingadapted to be engaged bv said actuator to be actuated by the same.

13. A machine for contracting the end ringsof a rot-or winding,comprising a carrier, a plurality of contracting members on said carrierand integral therewith, and an actuator adapted to move the contractingmembers on relative movement between the actuator and the jaws.

14. A machine for contracting the end rings of a rotor winding,comprising a carrier, a plurality of contracting members integrally andyieldingly mounted on said carrier and having jaws on their innerfacesto engage the end rings, their outer faces having inclined surfaces, andan' actuator having an inclined track to engage said inclined surfacesand to move said jaws into contracted position upon relative movementbetween said actuator and said jaws.

15. A machine for contracting the end rings of arotor winding,comprisinga carrier, a plurality of contracting members integrally andyieldngly mounted on said carrier, an actuator to actuate saidcontracting members, and a resilient support for the rotor.

16. A machine for contracting the end rings of a rotor Winding,comprising a carrier, contracting members mounted on said carrier, anactuator to actuate said contracting members, a support for the rotor,and means for limiting the contraction of the end rings.

In Witness whereof, I have hereunto subscribed my name.

JOHN M. BARR.

